The 3rd seminar of the Fall Friday Seminar Series 2022 “Vulnerability of Modern Power Systems – Perspective of Short-Term Voltage Stability and System Strength” by Aleksandar Boričić, PhD Candidate, Delft University of Technology (TU Delft) was given on October 28th.
Power systems are evolving rapidly. Decentralized generation and the rise of power-electronics devices are at the essence of the energy transition. However, they also bring many technical challenges for the resilient operation of power systems. On the production side, we all witness the unprecedented proliferation of Inverter-Based Resources (IBRs) and Distributed Energy Resources (DERs), scattered throughout the grid on every voltage level. Meanwhile, on the demand side, loads are becoming more complex as well, as the number of dynamic loads such as induction motors and electronic loads increases. Paired with the general trend of decreasing number of synchronous generators (SGs), this all leads to lower inertia and system strength, and consequently enhanced and accelerated frequency and voltage disturbances in power grids. While lower inertia is a known and well-researched phenomenon worldwide, low system strength is emerging as one of the key challenges for preserving grid stability, particularly in terms of short-term voltage deviations. To preserve system resilience and minimize system vulnerability, interactions between these phenomena should be well understood, analysed, and their negative impacts mitigated.
This lecture will present some of the key challenges and possible solutions for grid vulnerability from the perspective of (short-term) voltage stability and system strength, and the relevant impacts of active distribution networks. The research is performed at TU Delft, in cooperation with a large industry consortium. Furthermore, the work is a part of a broader Dutch project ReSident – Resilient Synchromeasurement-based Grid Protection Platform.
About the author:
Aleksandar Boričić received his M.Sc. degrees from KTH Royal Institute of Technology (Sweden) and Eindhoven University of Technology (Netherlands) in electrical engineering, with a focus on electric power systems with an increasing share of renewables. He completed his master’s thesis externally at ABB Corporate Research in Sweden on the impact of wind parks on transmission relay protection. Prior to that, he completed his bachelor’s and specialization studies in electric power systems at the University of Montenegro, with a thesis in the field of improving power system transient stability with FACTS devices. He has worked as a Power Systems Engineer in the TSO of Montenegro, and Electrical Engineer/Consultant at DNV-GL (KEMA). Since mid-2019, Aleksandar is a PhD candidate at TU Delft within the Intelligent Electrical Power Grids group, under the ReSident project. His main research areas include power system stability, grid dynamics, protection, and wide-area monitoring protection and control. He is an active member of IEEE and CIGRE.